#include <stdio.h>
int main(void)
{
    int a=10;
    int b=++a; //先对a进行+1， 再把a赋值给b
    int c=a++; //先把a的值赋值c， 再对a加1
    printf("%d, %d, %d\n", a, b, c);   //12, 11, 11


    int i = 10;
    printf("%d, %d, %d, %d, %d\n", i, ++i, i++, ++i, i++);//14,14,12,14,10
}